Burning fossil fuels like gasoline and diesel releases carbon dioxide, a greenhouse gas (GHG), into the atmosphere. Transportation is the largest contributor of GHG emissions in the U.S. The IGND aims to reduce emissions from the City vehicle fleet by 50 percent by 2025. The electrification strategy also includes electrification projects in six main city neighborhoods, a micromobility strategy including scooters and bicycles, and a program that provides pre-owned vehicles to low-income recipients.